187138 has 8 divisors (see below), whose sum is σ = 320832. Its totient is φ = 80196.

The previous prime is 187133. The next prime is 187139. The reversal of 187138 is 831781.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (187133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6670 + ... + 6697.

It is an arithmetic number, because the mean of its divisors is an integer number (40104).

2¹⁸⁷¹³⁸ is an apocalyptic number.

187138 is a deficient number, since it is larger than the sum of its proper divisors (133694).

187138 is a wasteful number, since it uses less digits than its factorization.

187138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13376.

The product of its digits is 1344, while the sum is 28.

The square root of 187138 is about 432.5944983469. The cubic root of 187138 is about 57.1988540367.

It can be divided in two parts, 18713 and 8, that added together give a triangular number (18721 = T₁₉₃).

The spelling of 187138 in words is "one hundred eighty-seven thousand, one hundred thirty-eight".